Regex Explainer (AI)
RegexPaste any regex pattern and get a plain-English, token-by-token breakdown of what it matches, powered by GPT-4o mini
Inheriting a regex like ^(?=.*[A-Z])(?=.*\d).{8,}$ from a coworker's PR or a Stack Overflow answer is a common source of quiet confusion, and this pastes it into GPT-4o mini on the server to get a plain-English breakdown of every token, capture group, and flag. It also generates example strings that would and would not match, which is often faster than mentally tracing the pattern yourself. It explains what a pattern does rather than testing it against your own data or auditing it for catastrophic backtracking. Pair it with the Regex Tester for live matching against real input, or the Regex ReDoS Detector if you're worried about performance. It targets JavaScript/ECMAScript regex syntax by default, so mention it in the pattern's context if you need PCRE or another flavor's semantics explained instead.
How to use Regex Explainer (AI)
- 1.Paste a regex pattern (and optional flags like gi) to get a plain-English summary and a token-by-token breakdown.
- 2.Check the generated match and non-match examples to sanity-check your understanding before relying on the pattern.
- 3.Use the standalone Regex Tester afterward to run the explained pattern against your own real sample text.
Frequently asked questions
Use via API, SDK, or MCP
cURL# Free: a few generations/month · Pro: more per month
curl -X POST api.utilix.tech/v1/ai/regex-explain \
-H "Authorization: Bearer utx_live_..." \
-H "Content-Type: application/json" \
-d '{"prompt": "..."}'Free plan includes a monthly quota; Pro raises the limit. Get an API key from your dashboard · Full API docs →